Counterweight for toilet tank



FIG. 1 is a bottom perspective view of a counterweight for a toilet tankshowing our new design;

FIG. 2 is a side elevational view thereof, the other sides being same asthe side shown;

FIG. 3 is a top plan view thereof and

FIG. 4 is a bottom plan view thereof.

The ornamental design for a counterweight for toilet tank, as shown anddescribed.